Features: Compliance: Applications Warranty

Features: Compliance: Applications Warranty
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
The GigaTech Products MFEBX1-GT is programmed to be fully compatible and functional with all
intended LINKSYS switching devices. This SFP optical transceiver is based on the Fast Ethernet standard
and is designed to be compliant with SFF-8472 SFP Multi-source Agreement (MSA). This module is
designed for single mode simplex fiber and operates at a nominal transmit wavelength of 1310nm and
nominal receive wavelength of 1550nm.
Features:
•
Up to 125MBd bi-directional data links
•
Hot-pluggable SFP footprint
•
1310nm FP laser transmitter
•
Simplex LC Connector
•
Built in Digital Diagnostics
•
Up to 20km over 9/125 SMF
•
Single power supply 3.3V
•
Operating temperature range
C-Temp: 0℃ to 70℃
Compliance:
•
SFP MSA SFF-8472
•
Fast Ethernet
•
IEEE 802.3ah 1000Base-BX
•
RoHS
•
Class 1 laser product EN 60825
Applications
•
125MBd Fast Ethernet
Warranty:
GigaTech Branded Optical Transceivers- Lifetime Warranty
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
General Specifications
Parameter
Data Rate
Bit Error Rate
Input Voltage
Maximum Voltage
Supply Current
Storage Temperature
Symbol
DR
BER
VCC
VMAX
IS
TSTO
Min
Typ
Max
Unit
125
3.0
-0.5
Remarks
MBd
10-12
3.6
4.0
250
85
3.3
150
-40
V
V
mA
℃
Electric Power Interface
Electric Power Interface
Ambient Temperature
Optical Characteristics - Transmitter
Parameter
Symbol

Optical Center Wavelength
Output Optical Power
Extinction Ratio
Spectral Width (RMS)
Relative Intensity Noise
Optical Rise/Fall Time
PTX
ER
Min
Typ
Max
Unit
1260
-14
9
1310
1360
-8
nm
dBm
dB
nm
dB/Hz
ns

RIN
TRF_IN
1
4
– 120
2
Remarks
Class 1 Product
20%-80%
Optical Characteristics - Receiver
Parameter
Optical Center Wavelength
Optical Receive Power
Receiver Sensitivity
Optical Return Loss
Optical Isolation
Loss of Signal-Asserted
Loss of Signal-Deasserted
Loss of Signal-Hysteresis
Symbol
C
PRX
RX_SEN
ORL
ISO
PLOS_A
PLOS_D
Min
Typ
1480
Max
Unit
1580
0
-32
nm
dBm
dBm
dB
dB
dBm
dBm
dB
14
-40
-45
-32
0.5
Remarks
Average
Electrical Characteristics – Transmitter
Parameter
Input differential impedance
Single ended data input swing
Transmit Disable Voltage
Transmit Enable Voltage
Transmit Disable Assert Time
Symbol
RIN
VIN_PP
VD
VEN
Min
Typ
Max
Unit
Remarks
Non Condensing
1200
VCC
VEE +0.8
10
Ω
mV
V
V
us
100
250
VCC -1.3
VEE
Electrical Characteristics – Receiver
Parameter
Single ended data output swing
Data output rise time
LOS Fault
LOS Normal
Symbol
Min
Typ
Max
Unit
VOUT_PP
TR
VLOS_F
VLOS_N
300
400
800
300
mV
ps
V
V
VCC -0.5
VEE
VCC_HOST
VEE +0.5
Remarks
20%-80%
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
Digital Diagnostic Functions
The SFP supports the 2-wire serial communication protocol as defined in the SFF 8472. Digital diagnostic
information are accessible over the 2-wire interface at the address 0xA2. Digital Diagnostics are internally
calibrated by default. A micro controller unit inside the transceiver gathers the monitoring information and reports
the status of transceiver.
Transceiver Temperature- Internally measured, represented as a 16 bit signed twos complement value in
increments of 1/256 degrees Celsius, Temperature accuracy is better than ±3 degrees Celsius over specified
operating temperature and voltage.
Transceiver Supply Power- Internally measured, represented as a 16 bit unsigned integer with the voltage
defined as the full 16 bit value (0 – 65535) with LSB equal to 100 μVolt, yielding a total range of 0 to +6.55 Volts.
Transceiver TX bias current- Internally measured, represented as a 16 bit unsigned integer with the current
defined as the full 16 bit value (0 – 65535) with LSB equal to 2 μA, yielding a total range of 0 to 131mA. Accuracy is
better than ±10% over specified operating temperature and voltage.
Transceiver TX output power- Internally measured, represented as a 16 bit unsigned integer with the power
defined as the full 16 bit value (0 – 65535) with LSB equal to 0.1 μW. Data is assumed to be based on measurement
of laser monitor photodiode current. Accuracy is better than ±3dB over specified temperature and voltage. Data is
not valid when the transmitter is disabled.
Transceiver RX received optical power- Internally measured, represented as a 16 bit unsigned integer with the
power defined as the full 16 bit 35 value (0 – 65535) with LSB equal to 0.1 μW. Accuracy is better than ±3dB over
specified temperature and voltage.
Parameter
Symbol
Accuracy
Units
Report Range
Unit
Temperature
Voltage
Bias Current
Tx Power
Rx Power
TMON
VMON
TF
VLOS_F
VLOS_N
±3
±0.1
±10
±3
±3
℃
V
%
dB
dB
-40 - +95
2.7 - 3.9
1 – 80
-18 - -5
-30 - 0
℃
V
mA
dBm
dBm
Dimensions
Remarks
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED UNIT: mm
PCB Layout Recommendation
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
Block Diagram of Transceiver
Transmitter Section- The FP laser driver accept differential input data and provide bias and modulation currents
for driving a laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average
optical power. 1310nm FP in an eye safe optical subassembly (OSA) mates to the fiber cable.
TX_DISABLE- The TX_DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on
within 1ms when TX_DISABLE is low (TTL logic “0”).
TX_FAULT- When the TX_FAULT signal is high, output indicates a laser fault of some kind. Low indicates normal
operation.
Receiver Section- The receiver utilizes a PIN detector integrated with a trans-impedance preamplifier in an OSA.
This OSA is connected to a Limiting Amplifier which providing post-amplification quantization, and optical signal
detection. The limiting Amplifier is AC-coupled to the transimpedance amplifier, with internal 100Ω differential
termination.
Receive Loss (RX_LOS)- The RX_LOS is high (logic “1”) when there is no incoming light from the companion
transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in TTL
level.
Controller Section- The micro controller unit monitors the operation information of LD driver and Limiting
Amplifier and report these status to the customer.
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
Electrical Pad Layout
MFEBX1-GT
100BASE-BX-20U SFP Transceiver up to 20KM Linksys Compatible
Pin Assignment
PIN #
1
Symbol
VEET
2
3
TFAULT
TDIS
4
5
6
SDA
SCL
MOD_ABS
7
8
RS0
LOS
9
10
RS1
VEER
11
VEER
12
13
14
RDRD+
VEER
15
16
17
VCCR
VCCT
VEET
18
TD+
19
20
TDVEET
Description
Transmitter ground (common with receiver
ground)
Transmitter Fault
Transmitter Disable. Laser output disable on
high or open
Data line for serial ID
Clock line for serial ID
Module Absent. Ground within the module
No Connection required
Loss of Signal indication. Logic 0 indicates
normal operation
+3.3V Power Supply
Receiver ground (common with transmitter
ground)
Receiver ground (common with transmitter
ground)
Receiver Inverted DATA out. AC coupled
Receiver Non-inverted DATA out. AC coupled
Receiver ground (common with transmitter
ground)
Receiver power supply
Transmitter power supply
Transmitter ground (common with receiver
ground)
Transmitter Non-inverted DATA out. AC
coupled
Transmitter Inverted DATA out. AC coupled
Transmitter ground (common with receiver
ground)
Remarks
Circuit ground is isolated
from chassis ground
Disabled: TDIS>2V or open
Enabled: TDIS<0.8V
Should Be pulled up with
4.7k – 10k ohm on host
board to a voltage between
2V and 3.6V
LOS is open collector
output
Circuit ground is isolated
from chassis ground
Circuit ground is isolated
from chassis ground
Same as Pin# 1
Circuit ground is connected
to chassis ground
Circuit ground is connected
to chassis ground
References
1. IEEE standard 802.3. IEEE Standard Department, 2002.
2. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 2000.
3. Digital Diagnostics Monitoring Interface for Optical Transceivers – SFF-8472.
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